Tìm x biết:
Bài 53: Tìm x biết:
a) (x+3)2⋅(x−4)(x+4)=1(x+3)^2 \cdot (x-4)(x+4) = 1(x+3)2⋅(x−4)(x+4)=1
b) (x−2)2−(x+3)2−4(x+1)=5(x-2)^2 - (x+3)^2 - 4(x+1) = 5(x−2)2−(x+3)2−4(x+1)=5
c) 3(x+2)2+(2x−1)2−7(x+3)⋅3(x−3)=363(x+2)^2 + (2x-1)^2 - 7(x+3) \cdot 3(x-3) = 363(x+2)2+(2x−1)2−7(x+3)⋅3(x−3)=36
d) 3(x−1)2−3x(x−5)=213(x-1)^2 - 3x(x-5) = 213(x−1)2−3x(x−5)=21
Bài 54: Tìm x:
a) (x−2)2−(2x+3)2=0(x-2)^2 - (2x+3)^2 = 0(x−2)2−(2x+3)2=0
b) x2−6x2+9x=0x^2 - 6x^2 + 9x = 0x2−6x2+9x=0
c) 9(2x+1)2−4(2x+1)2=09(2x+1)^2 - 4(2x+1)^2 = 09(2x+1)2−4(2x+1)2=0
d) 4⋅x=2(x−42)24 \cdot x = 2(x - \frac{4}{2})^24⋅x=2(x−24)2
a) (x+3)2⋅(x−4)(x+4)=1(x+3)^2 \cdot (x-4)(x+4) = 1(x+3)2⋅(x−4)(x+4)=1
b) (x−2)2−(x+3)2−4(x+1)=5(x-2)^2 - (x+3)^2 - 4(x+1) = 5(x−2)2−(x+3)2−4(x+1)=5
c) 3(x+2)2+(2x−1)2−7(x+3)⋅3(x−3)=363(x+2)^2 + (2x-1)^2 - 7(x+3) \cdot 3(x-3) = 363(x+2)2+(2x−1)2−7(x+3)⋅3(x−3)=36
d) 3(x−1)2−3x(x−5)=213(x-1)^2 - 3x(x-5) = 213(x−1)2−3x(x−5)=21
Bài 54: Tìm x:
a) (x−2)2−(2x+3)2=0(x-2)^2 - (2x+3)^2 = 0(x−2)2−(2x+3)2=0
b) x2−6x2+9x=0x^2 - 6x^2 + 9x = 0x2−6x2+9x=0
c) 9(2x+1)2−4(2x+1)2=09(2x+1)^2 - 4(2x+1)^2 = 09(2x+1)2−4(2x+1)2=0
d) 4⋅x=2(x−42)24 \cdot x = 2(x - \frac{4}{2})^24⋅x=2(x−24)2